paper 100 repeat a 0 25 { repeat b 0 20 { //set c ((a*a)-(b*b)) set [(a*2)(100-(b*3))] ((a*a)-(b*b)) set [(a*4)(b*5)] ((a*a)-(b*b)) set [(100-(a*3))(b*4)] ((a*a)-(b*b)) } }